Blender Fluid Baking taking so long
With a complex, i.e. demanding, fluid sim as it is in your case (the hardware needs to calculate the wave hitting the rocks, turbulences etc as well!) it's best to use both CPU and GPU. Especially if the sim has several hundred frames, which means their number should be reduced. And, apart from the above, try the ca. 200 resolution. It's the max res I used and water didn't look awful.